Machine for compacting and solidifying concrete and other plastics



Nov. 22, 1927. 1,650,574

R. C. STUBBS MACHINE FOR COMPACTING AND SOLIDIFYING CONCRETE AND OTHER PLASTICS Filed 50, 1925 2 Sheets-Sheet 1 Nov. 22, 1927.

1,650,574 R. c. STUBBS MACHINE FOR COMPACTING AND SOLIDIFYING CONCRETE AND OTHER PLASTICS File Nov- 30.. 1925 2 Sheets-Sheet 2 ing for streets, roads and the'like; and the indicate the same parts throughout the sev- 60 atented Nov. 2 2 1927. V j i SATES PATET OFECE.

ROBERT C. 'STUBBS, OF DALLAS, TEXAS; MARIE M. STUIBBS EXECUTRIX OF SAID R. 0.

- STUBBS, DECEASED.

MACHINE FOR COMPACTING- AND SOLIDTFYING CONCRETE AND OTHER PLASTICS.

' Application filed November 30, 1925. Serial No. 72,335.,

My invention relates to improvements in Fig. .6 is a detail view, showing the flyvibratingmachines and more particularly to wheels and the means for driving the outpressure vibrating machines for solidifying of-balancing cylinders. concrete and other plastics for making pav- Similar characters of reference are used to object is to provide compacting machines eral views.

with means for effecting vibrations which The drawings show a motor of approved can be transmitted to the mass to be solidified type which is to be used for effecting vibraand particularly to provide means for varytions of the mechanism herein shown. The

ing the amount or force of the vibrations motor is provided with fly-wheels 1 and 2 65 according to the requirements of different and a shaft 3 therefor. In the operation of structures or for adjusting the mechanical the motor, the fly-wheels 1 and 2 are driven. devices for varying the force of the vibra- Motion is obtained from one of the flytions. For carrying out' such objects a wheels for operating the out-o'f-balancing 1 motor is provided with the necessary fiyelements. It is apparent that both fly- 70 wheels or balance wheels and a suitable Wheels can be used for this purpose. The frame. One object of this invention is to shaft of the wheels is journaled in an upright provide out-of-balancing devices which may frame 4. The motor, shown in this applicabe operated from one or more of the flytion, is provided with a crank case 5. The

Wheels and to provide manually operated out-of-balancing elements are mounted on devices by which the speed of the out-ofand operated by a shaft 6 which is journaled balancing means may be increased or de- 'in frame 4. The out-of-balancing elements creased at will and also to provide simple include an outer cylinder which has a heavy devices for changing the force of the vibraor weighted side 7 and a light side 8, eachtions. Another object is to transmit the viextending approximately 180 degrees. The $0 brations created in the frame of the machine two cylinders may be adjusted relative to throughout the mass of material to be com each other so that there will be no vibrapacted and solidified. Other objects and tions or they may be adjusted so that the advantages will be fully explained in the foL maximum Vibrations may be obtained or lowing description and the invention will adjusted to any point between the position 85 be more particularly pointed out in the for maximum vibrations and the position claims. for no vibrations. The inner cylinder has Similar characters of reference are used a weighted side 9 and a light side 10. The

to indicate the same parts throughout the inner cylinder may be keyed to the shaft 6 several views. as shown in the drawings so that it will ro- 90 Fig. 1 is a perspective view of the vibrattate with the shaft 6. The outer cylinder ing machine. may be held at any required point of ad- Fig. 2 is a longitudintfl section of two justment relative to the inner cylinder by a cylinders which are provided with light collar 11 which is rigid with the inner 'cyland heavy sides and also provided with adinder and is provided'with a corrugated or 95 justing devices for changing the position of notched periphery and by a dog or plunger one cylinder relative to each other. I 12 which is yieldably mounted on a spoke Fig. 3 is an end elevation of the two cylof the outer cylinder and adapted to engage inders, showing the two cylinders with their any one of the corrugations or notches in heavy sides diagonally opposite for causing the collar 11. The dog 12 is carried by a f the cylinders to balance so that there can be spring 13 which is attached to the spoke of no out-of-balanceeffect. the outer cylinder.

Fig. 4 is a similar View, showing the outer The means for driving the out-of-balance cylinder shifted approximately 45 degrees elements include a frictlon wheel 14 which relative to the inner cylinder which makes is journaled in a yoke lever 15-which is cara the cylinders partly out of balance. ried by a fulcrum 16 which is mounted in Fig. 5 is a similar view, showing the outer the frame 4. The yoke 15 is used to hold the cylinder shifted approximately degrees wheel 14 in mesh or against the face of the relative to the inner cylinder for causing wheel 1 so that the wheel 14 will be driven a greater out-of-balancing of the cylinders. byv the wheel 1. The yoke 15 is provided with a handle 18 for operation of the yoke and the" wheel 14 for adjusting purposes. The friction wheel 14 is driven bythe wheel 1 and drives the cylinder 78 or outer cylinder. The cylinders, that is, the inner cylinder and the outer cylinder are held in the balanced position normally by an involute spring 19 which is attached to the shaft 6 and to the rim of the outer cylinder. The spring will yield for setting the cylinders in the required positions relative to each other. A brake shoe 20 is provided to bear against the periphery of the outer cylinder and this shoe may be used when the cylinders are to be adjusted. Provision is made for axial adjustment of the friction wheel 14 011 the fulcrum shaft 16 so that the speed may be increased or decreased by moving the wheel 14 so that it will engage the wheel 1 near the periphery or to move wheel 14 nearer the center of the. wheel 1 to decrease the speed.

The vibrations created by the inner and outer cylinders are transmitted to the frame 4 and from frame 4, the vibrations are transmitted through the rollers 21. The shafts 22 of the rollers 21 are journaled in bearings 23 which are rigid with the frame 4. The rollers 21 transmit the vibrations to the transmitting unit which consists of a device in the nature of a platform composed of stringers 24: and cross strips or cleats 25. The stringer-s24 and the cleats 25 are so arranged as to permit air and excess water and mortar to escape from the surface of the concrete or plastic which is being treated with the pressure and vibrations.

It is common knowledge that concrete repared for paving purposes require the a dition of enough water to make the mass workable and in this condition the concrete becomes a plastic or hydrostatic mass. The application of any'amount of pressure will not eliminate the excess water from such mass and unless eliminated, the space so occupied by the excess water and air will make voids in the seasoned mass. The device herein described affords pressure in combina- A covering of hard crushed stone of suitable size is cast over the surface of the plastic mass before it is compacted and solidified and such stones are forced down into the mass and made a part of the mass by the devices herein described. Such stones occupy the spaces formerly occupied by the excess mortar and water and air in the mass and are bonded to the concrete by the bonding elements which are crystallized upon their surfaces, resulting in producing an extremely dense mass and becoming an approximately integral body with the concrete.

What I claim, is,

1. In a vibrating machine provided with a frame and a driven shaft and balance wheels thereon for compacting and solidifying plastic material; an out-of-balance element for ereatin vibrations in said frame, a friction wheel interposed between said out-of-balance element and said shaft and actuated by one of said wheels for operating said outof-balance element, and a yoke fulcrumed on said frame for moving said friction wheel to contact with said balance wheel and said out-of-balance element.

2. In a vibrating machine provided with a frame and adriven shaft and balance wheels thereon for compacting and solidifying plastic' material; an out-of-balance element for creating vibrations in said frame, a friction' wheel interposed between said outrof-balance element and said shaft and adapted to be placed in contact with the face of one of said balance wheels and in contact with the periphery of said out-of-balance element, and a yoke fulcrumed on said frame for actuating said friction wheel to start and to stop the operation of said out-of-balance element.

3. In a vibrating machine provided with a frame and a driven shaft and balance wheels thereon for compacting and solidifying plastic material; an out-of-balance element for creating vibrations in said frame, a friction wheel interposed between said out-of-balance element and said shaft and adapted to be placed in contact with the face of one of said balance wheels and in contact with the periphery of said out-of-balance element, and a yoke fulcrumed on said frame for actuating said friction wheel to start and to stop the operation of said out-of-balance-element, and means for shifting said yoke on its fulcrum for engaging said balance wheel closer to or further from its center.

In testimony whereof, I set my hand, this 18th day of November, 1925.

ROBERT C. STUBBS. 

